Toán Lớp 7: (x+2013) *2012+ Iy-2012I*2013=0
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Toán Lớp 7: (x+2013) *2012+ Iy-2012I*2013=0
Comments ( 2 )
Ta có:
{((x+2013)^2012ge0forallx),(|y-2012|^2013ge0forally):}
=>(x+2013)^2012+|y-2012|^2013ge0forallx;y
Mà (x+2013)^2012+|y-2012|^2013=0
=>{((x+2013)^2012=0),(|y-2012|^2013=0):}
=>{(x+2013=0),(y-2012=0):}
=>{(x=0-2013),(y=0+2012):}
=>{(x=-2013),(y=2012):}
Vậy x=-2013;y=2012